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new and ()

I understand the difference between:

Code:

function foo() { /* more here */};
var x = foo;

and

Code:

function foo() { /* more here */};
var x = foo();

The former assigns x the function foo and the latter assigns x the result of invoking foo(). But I don't understand how this interacts with new; I've seen "var o = new Object;" and "var o = new Object();"? Is that the same distinction?

Javascript has a very forgiving syntax. You don't have to write semi-colons to separate statements -- a newline will do. Likewise, you don't have to put the empty parameter list, when using a function as constructor. It doesn't hurt to put it there though, and for sake of readability, it's good to be consistent.